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Title: Static strength of doubler plate reinforced CHS X-joints loaded by in-plane bending
Authors: Choo, Y.S. 
Liang, J.X. 
Van Der Vegte, G.J.
Liew, J.Y.R. 
Keywords: Doubler plate
Finite element analysis
In-plane bending
Reinforced joints
Static strength
Issue Date: Dec-2004
Citation: Choo, Y.S., Liang, J.X., Van Der Vegte, G.J., Liew, J.Y.R. (2004-12). Static strength of doubler plate reinforced CHS X-joints loaded by in-plane bending. Journal of Constructional Steel Research 60 (12) : 1725-1744. ScholarBank@NUS Repository.
Abstract: In offshore platforms, doubler plates are used to facilitate field installation of auxiliary structural components to the main structure. Recent research on the static strength of axially loaded doubler plate reinforced Circular Hollow Section (CHS) T- and X-joints showed that appropriately proportioned plates can significantly improve the joint strength. This paper extends the numerical study to doubler plate reinforced CHS X-joints subjected to in-plane bending through systematic variation of the main geometric parameters. The load transferring mechanisms and failure modes of such joints, with different doubler plate size and thickness, are investigated and compared to corresponding un-reinforced joints. Within the range of geometric parameters investigated, the doubler plate is observed to provide strength enhancement up to 240% for the corresponding un-reinforced joint. Strength equations are established using the computed results for assessment of the static strength of doubler plate reinforced X-joints, and design recommendations are provided for this joint type. © 2004 Elsevier Ltd. All rights reserved.
Source Title: Journal of Constructional Steel Research
ISSN: 0143974X
DOI: 10.1016/j.jcsr.2004.05.004
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